GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2025-68353 (GCVE-0-2025-68353)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2026-05-11 21:51
VLAI
Title
net: vxlan: prevent NULL deref in vxlan_xmit_one
Summary
In the Linux kernel, the following vulnerability has been resolved: net: vxlan: prevent NULL deref in vxlan_xmit_one Neither sock4 nor sock6 pointers are guaranteed to be non-NULL in vxlan_xmit_one, e.g. if the iface is brought down. This can lead to the following NULL dereference: BUG: kernel NULL pointer dereference, address: 0000000000000010 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:vxlan_xmit_one+0xbb3/0x1580 Call Trace: vxlan_xmit+0x429/0x610 dev_hard_start_xmit+0x55/0xa0 __dev_queue_xmit+0x6d0/0x7f0 ip_finish_output2+0x24b/0x590 ip_output+0x63/0x110 Mentioned commits changed the code path in vxlan_xmit_one and as a side effect the sock4/6 pointer validity checks in vxlan(6)_get_route were lost. Fix this by adding back checks. Since both commits being fixed were released in the same version (v6.7) and are strongly related, bundle the fixes in a single commit.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6f19b2c136d98a84d79030b53e23d405edfdc783 , < 4ac26aafdc8c7271414e2e7c0b2cb266a26591bc (git)
Affected: 6f19b2c136d98a84d79030b53e23d405edfdc783 , < 1f73a56f986005f0bc64ed23873930e2ee4f5911 (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.7
Unaffected: 0 , < 6.7 (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/vxlan/vxlan_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4ac26aafdc8c7271414e2e7c0b2cb266a26591bc",
              "status": "affected",
              "version": "6f19b2c136d98a84d79030b53e23d405edfdc783",
              "versionType": "git"
            },
            {
              "lessThan": "1f73a56f986005f0bc64ed23873930e2ee4f5911",
              "status": "affected",
              "version": "6f19b2c136d98a84d79030b53e23d405edfdc783",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/vxlan/vxlan_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.2",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: vxlan: prevent NULL deref in vxlan_xmit_one\n\nNeither sock4 nor sock6 pointers are guaranteed to be non-NULL in\nvxlan_xmit_one, e.g. if the iface is brought down. This can lead to the\nfollowing NULL dereference:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000010\n  Oops: Oops: 0000 [#1] SMP NOPTI\n  RIP: 0010:vxlan_xmit_one+0xbb3/0x1580\n  Call Trace:\n   vxlan_xmit+0x429/0x610\n   dev_hard_start_xmit+0x55/0xa0\n   __dev_queue_xmit+0x6d0/0x7f0\n   ip_finish_output2+0x24b/0x590\n   ip_output+0x63/0x110\n\nMentioned commits changed the code path in vxlan_xmit_one and as a side\neffect the sock4/6 pointer validity checks in vxlan(6)_get_route were\nlost. Fix this by adding back checks.\n\nSince both commits being fixed were released in the same version (v6.7)\nand are strongly related, bundle the fixes in a single commit."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:51:33.638Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4ac26aafdc8c7271414e2e7c0b2cb266a26591bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f73a56f986005f0bc64ed23873930e2ee4f5911"
        }
      ],
      "title": "net: vxlan: prevent NULL deref in vxlan_xmit_one",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68353",
    "datePublished": "2025-12-24T10:32:44.068Z",
    "dateReserved": "2025-12-16T14:48:05.300Z",
    "dateUpdated": "2026-05-11T21:51:33.638Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-68353",
      "date": "2026-09-15",
      "epss": "0.00183",
      "percentile": "0.08054"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68353\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-24T11:15:58.653\",\"lastModified\":\"2026-06-17T09:58:59.233\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: vxlan: prevent NULL deref in vxlan_xmit_one\\n\\nNeither sock4 nor sock6 pointers are guaranteed to be non-NULL in\\nvxlan_xmit_one, e.g. if the iface is brought down. This can lead to the\\nfollowing NULL dereference:\\n\\n  BUG: kernel NULL pointer dereference, address: 0000000000000010\\n  Oops: Oops: 0000 [#1] SMP NOPTI\\n  RIP: 0010:vxlan_xmit_one+0xbb3/0x1580\\n  Call Trace:\\n   vxlan_xmit+0x429/0x610\\n   dev_hard_start_xmit+0x55/0xa0\\n   __dev_queue_xmit+0x6d0/0x7f0\\n   ip_finish_output2+0x24b/0x590\\n   ip_output+0x63/0x110\\n\\nMentioned commits changed the code path in vxlan_xmit_one and as a side\\neffect the sock4/6 pointer validity checks in vxlan(6)_get_route were\\nlost. Fix this by adding back checks.\\n\\nSince both commits being fixed were released in the same version (v6.7)\\nand are strongly related, bundle the fixes in a single commit.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/vxlan/vxlan_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6f19b2c136d98a84d79030b53e23d405edfdc783\",\"lessThan\":\"4ac26aafdc8c7271414e2e7c0b2cb266a26591bc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6f19b2c136d98a84d79030b53e23d405edfdc783\",\"lessThan\":\"1f73a56f986005f0bc64ed23873930e2ee4f5911\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/vxlan/vxlan_core.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.2\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1f73a56f986005f0bc64ed23873930e2ee4f5911\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4ac26aafdc8c7271414e2e7c0b2cb266a26591bc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:43:29+00:00",
      "cve": "CVE-2025-68353",
      "id": "CVE-2025-68353",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Kernel: Denial of Service via NULL pointer dereference in VXLAN module",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68353.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:49:50Z",
      "cve": "CVE-2025-68353",
      "id": "CVE-2025-68353",
      "initial_release_date": "2025-12-25T00:24:38Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "399",
      "product_status:known_not_affected": "538",
      "product_status:recommended": "178",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-68353",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68353.json",
      "version": "23"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.